Continuum visibilities obtained in November 2007 (top panels, merged data from the two observing dates) and June 2009 (bottom panels, data from June 13). Left panels: amplitude (in Jy) of the visibilities, plotted against projected baseline length (in meters). Right panels: corresponding Fourier-plane coverage. The units correspond to the component of the projected baselines in the east-west (U) and north-south (V) directions (in m).